Fabrication of Carbon/Zinc Oxide Nanocomposites as Highly Efficient Catalytic Materials for Application in Dye-Sensitized Solar Cells
Different nanostructured semiconducting ZnO photoanodes were prepared by Hydrothermal (HT), Co-precipitation (CoP) and Chemical Bath Deposition (CBD) methods for their use in the Dye Sensitized Solar Cells (DSSCs) in the present study. Additionally, different ZnO nanocomposites were synthesized by m...
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| Veröffentlicht in: | Catalysts 2022-11, Vol.12 (11), p.1354 |
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| creator | Gulab, Hussain Fatima, Nusrat Shahzad, Nadia Shahzad, Muhammad Imran Siddique, Mohsin Hussain, Muhammad Humayun, Muhammad |
| description | Different nanostructured semiconducting ZnO photoanodes were prepared by Hydrothermal (HT), Co-precipitation (CoP) and Chemical Bath Deposition (CBD) methods for their use in the Dye Sensitized Solar Cells (DSSCs) in the present study. Additionally, different ZnO nanocomposites were synthesized by mixing the Carbon Nanotubes (CNTs), Graphene Oxide (GO) and their combination with the ZnO nanostructures. Scanning electron microscopy (SEM) revealed various morphologies of ZnO nanostructures and nanocomposites such as nanoflowers, nanorods, rhombohedral, cubic, and cauliflower-like nanorods, and nanorods with hexagonal symmetry. Energy Dispersive X-ray (EDX) spectra confirmed the purity of the synthesized samples. X-ray Diffraction (XRD) demonstrated the hexagonal wurtzite phase of ZnO and a minor presence of CNTs and graphene. The UV-Visible, transmittance and diffuse reflectance spectra demonstrated that the ZnO synthesized through the CBD method exhibits the highest transmittance as 70–71% in the UV-Vis range and reduced % R. Optical band gaps of the samples were determined with the help of Tauc plots. Comparison of J-V characteristics showed that the ZnO synthesized via the HT method exhibits the highest conversion efficiency of 1.45%. Comparison among pristine ZnO synthesized via CBD and ZnO nanocomposites revealed that ZnO/CNTs possesses the highest energy conversion efficiency of 1.23% with enhanced JSC of 4.49 mA/cm2. |
| doi_str_mv | 10.3390/catal12111354 |
| format | Article |
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Additionally, different ZnO nanocomposites were synthesized by mixing the Carbon Nanotubes (CNTs), Graphene Oxide (GO) and their combination with the ZnO nanostructures. Scanning electron microscopy (SEM) revealed various morphologies of ZnO nanostructures and nanocomposites such as nanoflowers, nanorods, rhombohedral, cubic, and cauliflower-like nanorods, and nanorods with hexagonal symmetry. Energy Dispersive X-ray (EDX) spectra confirmed the purity of the synthesized samples. X-ray Diffraction (XRD) demonstrated the hexagonal wurtzite phase of ZnO and a minor presence of CNTs and graphene. The UV-Visible, transmittance and diffuse reflectance spectra demonstrated that the ZnO synthesized through the CBD method exhibits the highest transmittance as 70–71% in the UV-Vis range and reduced % R. Optical band gaps of the samples were determined with the help of Tauc plots. Comparison of J-V characteristics showed that the ZnO synthesized via the HT method exhibits the highest conversion efficiency of 1.45%. Comparison among pristine ZnO synthesized via CBD and ZnO nanocomposites revealed that ZnO/CNTs possesses the highest energy conversion efficiency of 1.23% with enhanced JSC of 4.49 mA/cm2.</description><identifier>ISSN: 2073-4344</identifier><identifier>EISSN: 2073-4344</identifier><identifier>DOI: 10.3390/catal12111354</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Alternative energy sources ; Carbon ; Carbon nanotubes ; Catalysts ; Chemical engineering ; Chemical engineering research ; Chemical precipitation ; Chemical properties ; Chemical reactions ; Dye-sensitized solar cells ; Dyes ; Dyes and dyeing ; Energy conversion efficiency ; Graphene ; Materials ; Nanocomposites ; Nanomaterials ; Nanoparticles ; Nanorods ; Nanostructure ; Photocatalysis ; Photovoltaic cells ; Production processes ; Solar batteries ; Solar cells ; Solar energy ; Spectra ; Synthesis ; Transmittance ; Wurtzite ; Zinc oxide ; Zinc oxides</subject><ispartof>Catalysts, 2022-11, Vol.12 (11), p.1354</ispartof><rights>COPYRIGHT 2022 MDPI AG</rights><rights>2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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Additionally, different ZnO nanocomposites were synthesized by mixing the Carbon Nanotubes (CNTs), Graphene Oxide (GO) and their combination with the ZnO nanostructures. Scanning electron microscopy (SEM) revealed various morphologies of ZnO nanostructures and nanocomposites such as nanoflowers, nanorods, rhombohedral, cubic, and cauliflower-like nanorods, and nanorods with hexagonal symmetry. Energy Dispersive X-ray (EDX) spectra confirmed the purity of the synthesized samples. X-ray Diffraction (XRD) demonstrated the hexagonal wurtzite phase of ZnO and a minor presence of CNTs and graphene. The UV-Visible, transmittance and diffuse reflectance spectra demonstrated that the ZnO synthesized through the CBD method exhibits the highest transmittance as 70–71% in the UV-Vis range and reduced % R. Optical band gaps of the samples were determined with the help of Tauc plots. Comparison of J-V characteristics showed that the ZnO synthesized via the HT method exhibits the highest conversion efficiency of 1.45%. Comparison among pristine ZnO synthesized via CBD and ZnO nanocomposites revealed that ZnO/CNTs possesses the highest energy conversion efficiency of 1.23% with enhanced JSC of 4.49 mA/cm2.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/catal12111354</doi><orcidid>https://orcid.org/0000-0002-1414-772X</orcidid><orcidid>https://orcid.org/0000-0002-5687-8889</orcidid><orcidid>https://orcid.org/0000-0003-3504-3935</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Alternative energy sources Carbon Carbon nanotubes Catalysts Chemical engineering Chemical engineering research Chemical precipitation Chemical properties Chemical reactions Dye-sensitized solar cells Dyes Dyes and dyeing Energy conversion efficiency Graphene Materials Nanocomposites Nanomaterials Nanoparticles Nanorods Nanostructure Photocatalysis Photovoltaic cells Production processes Solar batteries Solar cells Solar energy Spectra Synthesis Transmittance Wurtzite Zinc oxide Zinc oxides |
| title | Fabrication of Carbon/Zinc Oxide Nanocomposites as Highly Efficient Catalytic Materials for Application in Dye-Sensitized Solar Cells |
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